Elevator-gate-operating mechanism.



A. LANDRY.

ELEVATOR GATE OPERATING MECHANISM. APPLICATION men NOV.25, 1913.

Patented June 1, 1915 1514187%0 2 SHEETS-SHEET] 7 0 W G 22 fly i? r 7i 6 i N f L 1 I I f I v, lVfT/VESSES: //1VVENTOR, f BfZZvfirz/y Zmrzdzy A TTORNJZY.

A. LANDRY. ELEVATOR GATE OPERATING MECHANISM.

APPLICATION FILED NOV- 25 1913- 1, 41,874 I Patented June 1, 1915.

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.being any of the usual ones and not ALBANY LANDRY, 0]? INDIAN ORCHARD, MASSACHUSETTS.

. ELEVATORr-GATE-OPERATING MECHANISM.

LMLLS'M.

Specification of Letters Patent.

Patented June it, 1915.

Application filed November 25, 1913. Serial No. 802,866.

To all whom it may concern Be it known that I, ALBANY LANDRY, a British subject, and resident of Indian Orchard, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Elevator-Gate- Operating Mechanisms, of which the following is a full, clear, and exact description.

This invention is comprised in a mecha nism for operating gates or doors which have rising and lowering movements at the side of the well in which a freight or other elevator runs.

The mechanism of this invention is operative, as the elevator approaches a floor, to raise the elevator gate at such floor, to hold it raised while the elevator remains at the floor, and then as the elevator passes away from that floor to cause the lowering of the ate.

g The invention is described in conjunction with the accompanying drawings and is set forth in the claim.

In the drawings :-Figure' 1 is an elevation taken through an elevator well, showing a portion of an elevator, the gate and the gate operating mechanism. Fig. 2 is a plan view of the gate operating mechanism, and Fig. 3 is an elevation of the same as seen at right angles to Fig. '1. Fi s. 4, 5 and 6 are diagrammatic views to il ustrate the action of the means for reversing the position of one of the gear wheels of the device for correspondingly reversely moving the gate. Fig. 7 is a perspective view of the toothed and cam carrying wheel constituting a prominent feature of thisinvention.

In the drawings, Fig. 1, A represents the well, B a portion of the elevator of which B is the elevator platform,'-the means for the hoisting and lowering of the elevator deemed necessary to be here shown.

0 represents the gate, here shown as in its raised position above the floor at which the elevator platform B is assumed to have come. The gate is raised by the cable a and is drawn down to lowered position by the cable a, these cables, havin winding and unwin with t odouble spool D.

12 represents a counterpoise for the gate.

. On the elevator platform is a vertical rack bar F which extends upwardly and downwardly relatively to the level-of the platform, and on each floor in suitable relamg connections suitabl sheave guided,

tion to the line or vertical path of movement of the rack bar is a spur gear wheel E, mounted on a short shaft E in the standards d d in which is also journaled another shaft G which has a pinion H aflixed thereon and which is in constant mesh with the rack actuated gear wheel E. The shaft G horizontally ranging, comprises two sections,-the shaft proper orsection G which carries the pinion H and which rotates in fixed journal supports, and the section G which is by universal joint J connected to the section G, so that it may have a horizontal swinging movement as constrained in the supporting and guiding stand 6, so that it may have shifted positions, that is from the one shown in full lines in Fig. 2 to the one shown by the dotted lines. The shaft section Gr carries a toothed wheel L, the teeth of which are more than usually open. This toothed wheel coacts with and drives a rotative element M which is suitably journaled for rotation on a horizontal axis and has associated therewith and for rotation concurrently therewith, a bevel gear wheel 0, which is in mesh with a bevel gear Wheel P on the arbor D of the spool D. The aforementioned rotatable element M is in substance a mutilated spur gear wheel,the teeth thereof, however, for ease of action and avoidance of friction be.- ing made in the form of conoidal rollers g g; and these are arranged in uniform separation around the greater portion of the circumference of the wheel body or,rotatable element M, with, however, a gap or space as created by the omission of a tooth or roller and in which space are located double edged -cams 72. k, the contour of each of which is approximately semi-circular, and conformable to, or being coincident with the periphery of an imaginary cylinder concentric with the axis of the part M. These reversed cams are comprised in a single plate j of a general arc shape, and which 1s screwed on the side or rim of the rotatable element M in the gap where a tooth of the element is omitted.

It is to be particularly noted that the wheel L has as an appurtenance thereof an axial stud or projection Q, which may be formed integrally with the toothed wheel L, or it may be constituted by an extremity of the shaft section G extended beyond the face of the wheel in the direction toward the rotatable element M. v In the movement of the elevator, ap-

proaching a floor, the rack-F is brought into engagement with the spur gear wheel E, causing the rotative movement of the shaft Gr, G whereby through the intermeshing of the wheel L with the teeth of the rotatable element M, the latter is caused to rotate in the proper direction to cause through the gearing O, P,, the turning of the spool D'to wind up the cable a to elevate the gate at the same time unwinding the other cable (L The length of the rack is such that between the time its end comes to engagement with the gear wheel E and the time when the center of the rack is opposite the center of such gear wheel, the appropriate winding and unwinding action of the spool is accomplished for the raising of thegate to the full limit of its movement.

During the time the gate is being raised the rotatable element is making the greater part of a revolution whereby at about the time the elevator platform is level with the floor, the cam plate It will have come around for coaction with the stud Q, axially projecting beyond the face of the toothed Wheel L which has its location as apparent in Fig. 2 to one side of the plane of rotation of the teeth of the rotatable element L. One of the cam edges h now becomes effective to exert a crowding action against the stud Q to bodilyforce the toothed wheel L transversely and horizontally so that it is thrown to the opposite side of the plane of revolution of the roller teeth of the wheel M and so that notwithstanding the fact that 'the shaft G G and'the wheel L are rotated in the same direction, the wheelLbecomes effective for turning the roller tooth wheel M in the reversed direction, correspondingly reversing the rotation of the spool and e ecting the lowering of the gate during the time the second half of the length of the rack F is causing rotation of the gear wheel E. 'In other words, it is to be stated that the elevator, for instance, in rising and approaching a floor will through the described mechanism, cause the raising of the gate and then while the elevator is moving upwardly still further causethe lowering of the gate.

It is to be explained that the shaft carried gear Ti is effective to 'turn the roller toothed wheel M to cause winding or unwinding rotations of the spool accordingly as to whichever side of the plane of revolution of the roller teeth 9 the said wheel M may be. Assuming, for instance, that the teeth of wheel L are to one side of the mentioned plane of revolution of the roller teeth, the teeth of vheelL successively operate for a down forcing action against the tops of the roller teeth, but when the said wheel L is shifted to the other side of theplane of revolution of the roller teeth, instead of downwardly forcing such teeth they exert a lifting action on each thereof whereby the revoluble element M is caused to be cor-.

the teeth of wheel L have a straddling relation to a tooth of the wheel M; and now'under a further or continued rotary movement of the wheel L one of its teeth'by impingement against the roller tooth of the wheel M,-,which latter cannot be displaced from its plane of revolution,necessarily causes the bodily displacement of the wheel L to the opposite side, the shaft section swinging as permitted by the provision of the universal joint. I

It is to be further mentioned that the parts are so organized and adjusted or set up for use that after the reversing actions primarily caused by the meshing of the rack with the.

spur gear wheel E, andwhen the elevator and its rack shall have passed away from mesh with such wheel E, the roller toothed wheel M will have have been revolved so that one of the cams 72. will have crowded, through its stud g, the wheel L to its centralized position, at which two of its teeth have the straddling relation to the adjacent roller tooth Gr. And when the parts are so positioned the mechanism serves as a lock for preventing the opening or releasing movement of the gate, for any attempt to lift the gate or to turn the spool or gearing 0, P, will be resisted by the engagement which the roller tooth of wheel M has in the crotch between two of the teeth of the then centralized wheel L; but the rotative movement .imparted to the wheel L by means of the rack f and gearing E, H, will cause the said wheel L to crowd itself to its offside position whereby its revolving teeth can ongage a'nd propel the roller teeth of the wheel M. I

While in the shifting or transverse displacement of the wheel by the cams H only portions of the cams between their outer ends and the center of the wheel M are affected, such cam edges are made semicircular or comprising double quadrantal portions so that these cam appliances may be said to be capable of universal action, that is they serve as transverse actuators whether the shaft carrying the wheel L is rotated in one direction when the elevator is going'up or rotated in the reversed direction when the elevator is descending.

The portion of the mechanism shown in Figs. 2 and 3 (with the exception of the mans'ze rack which is carried on the elevator) is to be provided or duplicated for each floor for combination with an elevator gate, and cagate installed thereat.

' bles connected for opposingly operating the gate, .of a vertical rack bar movable with the elevator, a bed plate, a shaft made of universally connected sections mounted on the bed plate, one of the sections being fixed against other than a rotative movement, the other section being mounted for rotative and lateral oscillatory movement, gearing connected with the first mentioned section and adapted to be engaged by the rack to i rotate the shaft, a wheel having radial teeth throughout a greater portion of its circumference, a shaft mounted on the bed plate and supporting said wheel, reversing cam members mounted on that portion of the wheel free of teeth, a spur gear mounted on the laterally movable portion of the shaft to engage the teeth of the wheel, an extension on said gear to be engaged by the re versing members to laterally shift the shaft and gear, a drum on which the respective cables are wound, a shaft mounted in the bed plate for supporting the drum and gearing intermediate the wheel shaft and drum shaft to operate the-drum in the movement of the wheel.

Signed by me at Springfield, Mass, in

presence of two subscribing witnesses.

111 ALBANY X LANDRY. 

